Secondary battery having tab with blowing agent and manufacturing method thereof
AssigneeLG Chem, Ltd.
InventorsJi-Hoon Jeon, Seung-Don Choi, Dae-Sik Choi, Nan-Ji Yun, Yong-Kyu Ju
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Abstract
Provided is a secondary battery, comprising an electrode assembly including a first electrode plate, a second electrode plate and a separator; and a case having a receiving portion for receiving the electrode assembly and an electrolyte therein, the secondary battery comprising: a blowing agent applied onto at least one of a first tab and a second tab in a width direction of the tab, the first and second tabs being, respectively, connected to the first and second electrode plates and connected to leads which extend through the case.
Claims19
A secondary battery, comprising:
- an electrode assembly including a first electrode plate having a first tab made from the same material as the first electrode plate;
- a first active material coated on a surface of the first electrode plate but not the first tab;
- a second electrode plate having a second tab made from the same material as the second electrode plate;
- a second active material coated on a surface of the second electrode plate but not on the second tab;
- a separator;
- a case having a receiving portion for receiving the electrode assembly and an electrolyte therein;
- a first lead having a first end connected to the first tab and a second end extending through the case;
- a second lead having a first end connected to the second tab and a second end extending through the case;
- and
- a blowing agent applied on at least one of the first tab and the second tab which are located within the receiving portion, the blowing agent expanding at a predetermined temperature.
A method for manufacturing a secondary battery, comprising:
- applying a first blowing agent onto each first tab of a plurality of first electrode plates;
- applying a second blowing agent onto each second tab of a plurality of second electrode plates;
- forming a first notch on at least one side of each first tab;
- forming a second notch on at least one side of each second tab;
- arranging the first electrode plates, a separator and the second electrode plates in order, and integrating the first and second tabs such that the first and second notches are aligned with each other, respectively;
- forming an electrode assembly by connecting ends of the first tabs to a first lead and ends of the second tabs to a second lead;
- receiving the electrode assembly and an electrolyte in a case, such that a portion of the first and second blowing agents are received within the case and the first and second leads protrude through the case;
- and
- sealing the case tightly,
- wherein the first and second blowing agents expand at a predetermined temperature.
Dependencies are inferred from the claim text.